Hello, I have gone through your query and understood the concern. Any alteration in the bowel habit should be carefully monitored and attended to immediately during pregnancy. Persistent cramping is not a good sign either. Please report the matter to your health care provider to check if you have entered any threatened preterm labor and therefore need hospitalization for monitoring. Meanwhile, take adequate rest, preferably in the left lateral position, avoid lifting weights and stress. Take adequate liquids and easily digestible diet. Wish you safe motherhood.